doi: 10.1038/ni1152.
Epub 2004 Dec 12.
Dendritic epidermal T cells regulate skin homeostasis through local production of insulin-like growth factor 1
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- PMID: 15592472
- DOI: 10.1038/ni1152
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Dendritic epidermal T cells regulate skin homeostasis through local production of insulin-like growth factor 1
Nat Immunol.
2005 Jan.
Abstract
A fine balance between rates of proliferation and apoptosis in the skin provides a defensive barrier and a mechanism for tissue repair after damage. Vgamma3(+) dendritic epidermal T cells (DETCs) are primary modulators of skin immune responses. Here we show that DETCs both produce and respond to insulin-like growth factor 1 (IGF-1) after T cell receptor stimulation. Mice deficient in DETCs had a notable increase in epidermal apoptosis that was abrogated by the addition of DETCs or IGF-1. Furthermore, DETC-deficient mice had reduced IGF-1 receptor activation at wound sites. These findings indicate critical functions for DETC-mediated IGF-1 production in regulating skin homeostasis and repair.
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